Eartquake larger than 5 are measured in the moment magnitude and smaller than 5 in The local magnitude scale (The Richter magnitude scale). The moment magnitude scale (MMS, MW or M) measure the size of earthquakes in terms of the energy released. The Richter magnitude scale measure a magnitude number to quantify the energy created by an earthquake. Tsunami warning alerts news today updated in real-time around the world. Tsunami warning alerts. Current and latest world earthquakes breaking news, activity and articles today.